Changes

<nowiki><!-- This is a comment --> </nowiki>

<nowiki><!-- This is a comment --> </nowiki>

Adding the <!-- and the double dash > adds a comment that can only be seen when people use the "Edit Source" button. It will not appear on the actual wiki page.

Adding the <nowiki><!--</nowiki> and ending it with a > makes a comment that only page editors can see when using the "Edit Source" button.